>> reporter: he blamed the federal government for failing to create a national database of the mentally ill and failing to enforce existing gun laws and accused the news media of sensationalizing the most horrific crimes. >> how many more copy cats are waiting in the wings for their moment of fame? from a national media machine that rewards them with wall-to- wall attention. >> reporter: democratic senator dianne feinstein of california, a long time leader in gun control, called the n.r.a.'s plan a distraction that's only intended to delay action by congress. >> should we have a conversation about school security? yes. should we have a conversation about mental illness and the culture of violence? yes. but we can't ignore the common denominator in all of these deadly massacres: access, easy access to killing machines. >> reporter: the fact is, scott, that one-third of america's public schools already have armed security and it's interesting to note an armed deputy sheriff was assigned to columbine high school near denver in 1999 but failed to stop that attack that killed 13. >> pelley: